Higgs boson: What scientists are saying about the 'God particle'

Scientists at CERN say that they are closing in on the Higgs boson, the elusive subatomic particle that, if discovered, could help explain why particles have mass. Here's what some of the world's leading physicists have to say about the announcement.

In this March 22, 2007 file photo, two engineers work to assemble one of the layers of the world's largest superconducting solenoid magnet (CMS, Compact Muon Solenoid) at the European Organization for Nuclear Research (CERN)'s Large Hadron Collider (LHC) particule accelerator, in Geneva, Switzerland. On Tuesday, scientists are closer than ever to hunting down the elusive Higgs boson 'God particle.'

Scientists at the world's largest particle accelerator announced today (Dec. 13) that they'd narrowed down the possibilities for the existence of the elusive Higgs boson particle. This particle, long theorized but not yet detected, is thought to explain why particles have mass.

Though it's too soon for physicists to declare a definite discovery of the Higgs, experts said the findings so far represent an important step forward. Here's what some leading physicists have to say about today's announcement:

"This is not the end, but the beginning. The Higgs was just the last missing piece of the Standard Model of particles. But that theory is ugly; it is a theory only a mother can love. The real breakthrough is when the LHC discovers dark matter or strings. That would be spectacular. So there is a whole new universe beyond the Higgs." [Gallery: Search for the Higgs Boson]

"Both experiments showed a very impressive turnaround in processing the data and very good understanding of their detectors. It is unprecedented to have full data samples from such complex experiments to be analyzed in a fairly sophisticated way in just one month since the end of the proton-proton run.

"Essentials: what we're seeing is pretty consistent with the existence of a Higgs boson around 123-126 GeV. The data aren't nearly conclusive enough to say that it's definitely there. But the LHC is purring along, and a year from now we'll know a lot more.

"It's like rushing to the tree on Christmas morning, ripping open a giant box, and finding a small note that says 'Santa is on his way! Hang in there!' The LHC is real and Santa is not, but you know what I mean."

"All in all, it's a definite maybe. Putting the results together in the way only a frequentist can the result is a 2.4 sigma detection. In other words, nothing any serious scientist would call convincing."

"Two independent (and highly competitive) research teams, involving thousands of scientists, using each of these detectors have seen moderately convincing evidence that the elusive Higgs particle has been created in some of the proton–proton collisions.

"This is a challenging experiment as the detectors can't see the Higgs particle directly — it is a short-lived particle that quickly falls apart (decays) — but, rather, they infer its presence by seeing its decay products."

"The proof will come in the next year. The spectacularly successful LHC accelerator (which the Europeans built when the U.S. killed the superconducting super collider in Texas) will produce 4 times more Higgs particles in the next year. The significance of the hints reported today could turn into proof beyond a doubt come next October.

"What does this mean? The biggest mystery physicists have been trying to understand for the last half century is the 'mystery of mass.' The hydrogen atom is the paradigm of nature, with a + proton surrounded by a quantum cloud of a -electron. Yet the proton is 2,000 times heavier than the electron. No one has the slightest idea why. Peter Higgs hypothesizes that the vacuum is filled with an as yet undiscovered particle, the Higgs particle, which acts as molasses in slowing down whatever passes through it. A heavier particle is nothing more than one that has more interactions with the Higgs particle as it passes through the vacuum.